/*
*    Qizx/open 3.0 beta
*
* This code is the open-source version of Qizx.
* Copyright (C) 2004-2009 Axyana Software -- All rights reserved.
*
* The contents of this file are subject to the Mozilla Public License 
*  Version 1.1 (the "License"); you may not use this file except in 
*  compliance with the License. You may obtain a copy of the License at
*  http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
*  WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
*  for the specific language governing rights and limitations under the
*  License.
*
* The Initial Developer of the Original Code is Xavier Franc - Axyana Software.
*
*/
using System;
using EvaluationException = System.Qizx.Api.EvaluationException;
using MatchOptions = System.Qizx.Queries.MatchOptions;
using MildNot = System.Qizx.Queries.MildNot;
using Selection = System.Qizx.Queries.Selection;
using EvalContext = System.Qizx.XQuery.EvalContext;
using Focus = System.Qizx.XQuery.Focus;
namespace System.Qizx.XQuery.Op
{
	
	public class FTMildNotOp:FTSelectionOp
	{
		public override bool Constant
		{
			get
			{
				return base.Constant && exp1.Constant && exp2.Constant;
			}
			
		}

        public FTMildNotOp(FTSelectionOp exp1, FTSelectionOp exp2)
            : base(exp1) {
            this.addChild(exp2);
        }

        public FTMildNotOp(FTSelectionOp exp1)
            : base(exp1) {
        }
		
		public override Selection expand(Focus focus, EvalContext context, MatchOptions inherited, float heritedW)
		{
			MildNot result = new MildNot();
			expandOptions(result, focus, context, inherited, heritedW);
			result.setChildren(exp1.expand(focus, context, result.MatchOptions, result.Weight), exp2.expand(focus, context, result.MatchOptions, result.Weight));
			return result;
		}
	}
}